Low complexity demapping algorithms survey in DVB-T2: Rotated constellation case study
AbstractSignal Space Diversity (SSD) technique was adoptedin Digital Video Broadcasting-Terrestrial, second generation(DVB-T2) standard ten years ago to increase system performanceover fading channels. This technique consists of rotated andcyclic Q-delayed M-Quadrature Amplitude Modulation (QAM)and has been proposed without considering the complexityinduced by the demapper. "Genie Aided" demapping algorithmbased on iterative demapping has been presented in DVB-T2and lets this system approach the Shannon limit. Furthermore,this algorithm is not suitable for hardware implementation.Due to the complexity of the hardware implementation algo�rithms, the advantages of this rotated constellation have notbeen effectively exploited for network deployment. Moreover,receivers provided by manufacturers do not include suitabledemappers when this technique is applied. Therefore, several lowcomplexity algorithms have been proposed during the last decadein the scientific literature to reduce the number of metrics andoperators used in the demapping process. This paper presentsan exhaustive review of demappers proposed for DVB-T2 andall the low complexity demapping algorithms existing up to nowin the literature that is suitable for hardware implementation.Details about these algorithms are given in terms of reduction,parameters, performance and percentage of reduction obtained.
The submitting author warrants that the submission is original and that she/he is the author of the submission together with the named co-authors; to the extend the submission incorporates text passages, figures, data or other material from the work of others, the submitting author has obtained any necessary permission.
Articles in this journal are published under the Creative Commons Attribution Licence (CC-BY). This is to get more legal certainty about what readers can do with published articles, and thus a wider dissemination and archiving, which in turn makes publishing with this journal more valuable for you, the authors.
In order for iJIST to publish and disseminate research articles, we need publishing rights. This is determined by a publishing agreement between the author and iJIST.
By submitting an article the author grants to this journal the non-exclusive right to publish it. The author retains the copyright and the publishing rights for his article without any restrictions.
The names and email addresses entered in this journal site will be used exclusively for the stated purposes of this journal and will not be made available for any other purpose or to any other party.